Search for CP violation in D (+/-) -> (KSK +/-)-K-0 and D-s(+/-) -> K-S(0)pi(+/-) decays

A search for CP violation in Cabibbo-suppressed D± → K0 SK± and D± s → K0 S π ± decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb−1 , recorded by the LHCb experiment. The individual CP-violating asymmetries are measured to be A D±→K0 SK± CP = (+0.03 ± 0.1...

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Bibliographic Details
Authors: Camboni, Alessandro, Garrido Beltrán, Lluís, Graciani Díaz, Ricardo, Graugés Pous, Eugeni, Marin Benito, Carla, Picatoste Olloqui, Eduardo, Rives Molina, Vicente José, Ruiz, Hugo (Ruiz Pérez), LHCb Collaboration
Format: article
Status:Published version
Publication Date:2014
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/185637
Online Access:https://hdl.handle.net/2445/185637
Access Level:Open access
Keyword:Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Experiments
Large Hadron Collider (France and Switzerland)
Particle physics
Description
Summary:A search for CP violation in Cabibbo-suppressed D± → K0 SK± and D± s → K0 S π ± decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb−1 , recorded by the LHCb experiment. The individual CP-violating asymmetries are measured to be A D±→K0 SK± CP = (+0.03 ± 0.17 ± 0.14)% A D ± s →K0 S π± CP = (+0.38 ± 0.46 ± 0.17)%, assuming that CP violation in the Cabibbo-favoured decays is negligible. A combination of the measured asymmetries for the four decay modes D ± (s) → K0 SK± and D ± (s) → K0 S π ± gives the sum A D±→K0 SK± CP + A D ± s →K0 S π± CP = (+0.41 ± 0.49 ± 0.26)%. In all cases, the first uncertainties are statistical and the second systematic. The results represent the most precise measurements of these asymmetries to date and show no evidence for CP violation. Submitted to JHEP

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